Convertible accounting machine



7 Oct. 8, 1940- I J.'w. BRYCE ET AL CONVERTIBLE ACCOUNTING MACHINE 18 Sheets-Sheet 1 Filed Aug. 7, 1955 mww wmw 3w mmw N Em OWN, MN MN MN wiv 4 4 411 M'rM ATTORNEYS Oct. 8, 1940. J. w. BRYCE Er AL CONVERTIBLE, ACCOUNTING umcumi.

Filed Aug. 7, 1955 18 Sheets-Sheet 2 26E 7 36: 36E 5 21 6 3 2. 6.. 5 26E INVENT RS WM. 5 LI. B N In C- Y )(uw :Mm

ATTORNEY g Oct. 8, 1940. J. w. BRYCE ET Ah CONVERTIBLE ACCOUNTINd MACHINE Filed Aug. 7, 1935 18 Sheets-Sheet 3 INVENT I. R5 0*- BY aw: 1 {I 60 w div T ATTORNEY s 9.8 s w a v -w Rm Rm NR wxw Oct. 8, 1940. J. w. BRYCE ET m. 2,217,196

CONVERTIBLE ACCOUNTING MACHINE I Filed Aug. 7, 1936 18 Sheets-Sheet 4 3i I (D. BY Mum/flab 7 ATTORNEY5' I Oct. 8', 1940. J. w. BRYCE ET AL I QONVERTIBLE ACCOUNTING MACHINE l8 Sheets-Sheet 5 Filed Aug. '7, 1955 mt E k NTUU \W oom E Fi INVENTOR3 TTORNEYJ wwE Oct. 8, 1940. J. w. BRYCE ET! AL CONVERTIBLEACCOUNTING'MACHINE Filed Aug. '7, 1936 18 Sheets-Sheet 6 ozEooterooeOoo nopozonaonozaoao lama 902mm -1- INVENTORS m slim BY w/ewbr m ATTORNEYS Oct. 8, 1940.

J. W. BRYCE ET Ab CONVERTIBLE ACCOUNTING MACHINE Filed Aug. 7, 19:55

Ma i u QL E E1 l8 Sheets-Sheet 7 ,Zw I W ATTORN EYS' Oct. 8, 1940. ,J. w. BRYCE ET AL 2,217,196

CONVERTIBLE ACCOUNTING MACHINE Filed Aug. 7, 1936 1a Sheets-Sheet a o-oooo-oo mmmm fywmwvw W i-m $07M MMm I ATTORNEYS Oct. 8, 1940. w BRYCE; ET AL 2,217,196

CONVERTIBLE ACCOUNTING MACHINE F iled Aug. '7, 1955 18 Sheets-Sheet 9 PRRo(ooRo) ATTORNEYS LAFIGJJ. v

Oct. 8, 1940'. J. w. BRYCE El AL CONVERTIBLE ACCOUNTING MACHINE Filed Aug. '7, 1935 18 She ets-Sheet 1O IEVEv mvm vm ATTORNEYS Oct. 8, 1-940. "J. w. BRYCE ET AL 2,217,196

CONVERTIBLE ACCOUNTING MAqmfuE Filed Aug. 7, 19:55 1a Sheets -Shee t 11 5 f INVEN'II'O Qs 409 gmw- 1 BY H- I" WMIM ATTOR NEYS ,00. 8, 1 940, I J. w. BRYCE El AL 2,2 6

CONVERTIBLE ACCOUNTING MACHINE Filed Aug. 7, 1935 18 Sheets-Sheet 13 SET F0194 T as H.

ATTORNEYS EMA/N767? 007/!7'14405 LIMIT/N6 FEV/ PLUG 504/29 0 e 02000 00 00 0 0 0 0 000 0 0. 0. 0 0 8 3 0 0! 0 15. 1 25 Z I Z 2 a. 00/ 2 a 4 4 4 .22512 T T w rm .WLW. A a M. E in 0Q x 8 M LT 2 f 1 1 A p, a: L- a in. W7 A O I- F 0 7 Ma Oct. 8, 1940. J. w. BRYCE El AL.

CONVERTIBLE ACCOUNTING mcnmn' Filed Aug. 7, 1955 is Sheets-Sheet 15 FIGS 5i INVENTORZL w y-ma ATTORNEYJ Get, 8, 1940. J. w; BRYCE ET AL CONVERTIBLE ACCOUNTING MACHINE.

' Filed ,Aug. 7, 1935 18 Sheets-Sheet l7 ATTORNEYS Oct. 8, 1940. .1. w. BRYCE El AL 2,217,196 CONVERTIBLE ACCOUNTING MACHINE v v Filed Aug. 7, 1935' 1a Sheets-Sheet 18 SENS! FOR ATTORNEY 5 FIG.

Patented Oct. 8, 1940 UNITED STATES PATENT. orrics Dickinson, New York,

N. Y assi'gnors to Inter-=- national Business Machines Corporation, New York, N. Y., a corporation of New York Application august '2, 1935, Serial No. 35,072

i Claims.

This invention relates to a record controlled calculating machine capable of performing multiplication as well as division. While machines capable of such conjoint use have been previously devised, prior machines were comparatively slow in their operation and complicated in construction. In certain previous machines calculating sections were provided including portions which were .wholly utilized for division and other portions which were wholly utilized for multiplication and such prior machines were provided with a common card analyzing section for separately controlling the division and multiplying calculating sections of the machine.

One object of the present invention resides in the provision of a calculating machine of such a construction that common calculating means and devices may be utilized either for multiplication or division, thereby simplifying the construction of the machine and materially reducing the mechanism required in the calculating section of the machine.

A further object of the present invention resides in the provision of novel and simple means for re-connecting and interrelating parts of the mechanism in one way or another according to whether the machine is to be used for division or multiplication.

A further object of the present invention resides in the provision of means to enable a machine to be changed by a single simple operation from a status in which it is capable of multiplying to a status in which it is capable of effecting division or vice versa, whereby setup time is mini- 35 mized and whereby the use of numerous complicated variably settable controlling elements is obviated.

Further and more general objects of the presa multiplying machine which efiects multiplica- -tion by the addition of preformed sub-products, saidsub-products being based upon an entered factor and in which a. lesser number of subproduct setting up and forming devices are em-,

ployed than heretofore.

A further object of the present invention resides in the provision of a combined machine adapted for multiplication or division and with bined machine capable of effecting either multicooperatively insertableplug board devices for both controlling the sequence of the machine op erations and functions according to the kind of problem to be performed and for also providing for variable selectivity of original entries and readout relations.

Previous accounting machines for effecting multiplication and/or division, particularly those. of the electro-mechanicai type. comprised a great multiplicity of switches which had to be selectively pre-set by the operator according to the functions which certain sections of the machine had to perform, and such prior machines also included a great multiplicity of flexible plug connections which had to be individually put in place by the operator. Such switch positioning and plug inserting operations are time consuming and required considerable skill and knowledge of the machine by the operator. Accordingly, one of the objects of the present invention is to provide an improved construction wherein such switches and individually insertable plug connections do not have to be manipulated at the machine by the operator but wherein the operator may by a single simple opera.- tion, set up the machine for a. given calculation, say for multiplication and then by another single simple operation change the machine so that it may eflect another calculation, say division. More particularly it is an object of the present invention to effect such machine changes by the utilization of insertable electrical units which may be inserted and removed from the ma.- chine as a unit. Such units may be pre-wired or pre-connected in advance by another operator and one setup may be kept ready for use in cooperation with the machine when required.

A further object of the present invention resides in the provision of a calculating machine of the electro-mechanical type wherein by a mere change of circuit connections adapted to be made expeditiously by the operator the machine can be changed from a status in which it is capable of multiplication to a status in which it is capable of division or vice versa.

Heretofore record controlled and record making accounting machines have been devised adapted to derive the factors of a computation from a record and to then multiply the factors and to record the product upon the record. Other record controlled and record making accounting machines have been devised to perform division computations in.- which the dividend and divisor data are derived from a record and in which quotient results, remainders, etc., corded upon the record.

Combined machines have also been provided adapted to perform both multiplication and division by over and over addition and over and over subtraction methods respectively. Machines of this latter class are, however, complicated in construction and comprise independent units which are separately used in the different types of computation. Such machines also require a great multiplicity of switch positioning and plugging operations upon the part of the operator for re-conditioning the machine for effecting a dividing computation or a multiplying computation or to change back from a condition in which onetype of computation may be performed to the other.

are re- According to the present invention a machine Upon these readout means the following multiples of an entered multiplicand may be set up, On the readout means of one amount receiving device the multiplicand times one and the multiplicand times '5 is set up. On the. readout device associated with: another amount receiving means the multiplicand times 2 and the multiplicand times 4 is set up. The set up of the multiplicand times 2 is effected by adding to an originally entered multiplicand amount another multiplicand amount derived from the MC times 1 readout. An amount receiving device is also provided for the multiplier factor and a result receiving device is provided for receiving the prodaforesaid various multiples of the entered multiplicand are automatically set up upon the readout devices, the pre-created and pre-set subproducts are entered into the result receiving device in accordance with the digit value of the visor and for subtracting the divisor in a shiftmultiplier in the corresponding multiplier receiving device.

. When it 'is desired to utilize the foregoing machine for dividing calculations, use is made of the calculating section of the machine which was formerly used for multiplication. All amount receiving devices of this calculating section are utilized in dividing calculations except the multiplier amount receiving device. In dividing calculations one of the amount receiving devices, which in multiplication receives a multiplicand amount, is utilized for receiving the divisor amount. Use is made of the product or result receiving device for" receiving the dividend entry and such device is also'utilized for receiving the quotient amount as the same is created by the calculating operation of the machine. One of the other amount receiving devices which upon multiplying computations was utilized for setting up the times 2 and times 4 multiples of the entered multiplicand is used for receiving a set up of '6 of the divisor amount. Such divisor factor is utilized upon dividing calculations for the operation of reintroducing the 'died over columnar relation in the event that the remainder goes back of zero during dividing calmultiplier receiving device is idle and is not utilized. Upon division, calculation is eflected by successively diminishing the dividend amount by the divisor amount and by re-introducing the divisor factor upon the remainder going back of zero. In order to set up the divisor factor, use is made of the one of the readout devicesfrom which the multiplicand times 1 is read out upon multiplying computations. Associated circuit controlling means are provided to adapt the readout from which the amount .of the multiplicand times one is read out upon multiplication so that either the divisor itself or the true complement thereof may be read out therefrom. Accordingly, upon division, an inverter readout is available for use in controlling subtraction operations and a direct readout is also available.

In order to convert the machine from a dividing machine to a multiplying machine or vice versa, use is made of circuit controlling means preferably in the form of insertable plug board elements which are inter-changeable according to the type of calculation to be performed by the machine. By the use of such ins'ertable, changeable and inter-changeable means, the operator, by a single operation and by an operation which can be effected expeditiously and which requires no particular skill or dexterity or great familiarity with the machine, is enabled to change it from a status in which it is capable of performing multiplication to a status in which it iscapable of performing division or vice versa. By utilizing changeable circuit controlling means or elements of the foregoing unitary type the necessity of manipulation of a great number of switches and the necessity of the selective disposition by the operator of a great number of plug connections is obviated. In this way the over-all speed of machine operation is increased and the time required to change the machine from a dividing to a multiplying machine or vice verse. is materially reduced.

It will be further understood that the cyclic sequence of operations of various devices and parts of the machine must be changed in modifying the machine from a dividing to a multiplying machine or vice versa. vSuch operations are controlled by sequence control means and other devices and such sequence control means and devices are also under the control of the unitary changeable circuit controllers. Furthermore, the entry relations and the readout relations for result recording may vary according to the particular problem being computed either in multlplication or division andsuch entry and readout relations may be controlled in a unitary manner by changeable circuit controllers. Such changeable circuit controllers for entries and result recording may be unitary with the function and sequence control circuit controller or separate or independent therefrom as desired.

Further and other objects. of the present invention will be hereinafter set forth in the accompanying specification and claims and shown in the drawings which show by way of illustrationa preferred embodiment and the principle thereof and what I now consider to be the best I mode in which I have contemplated of applying that principle. Other embodiments of the invention employing the same or equivalent principle may be used and structural changes made as desired by those skilled in the art without departing from the present invention and within the spirit of the appended claims. 

